Tour Nong Khai via Bangkok from Pattaya 5 days

  I traveled from Bangkok to Nong Khai by train.  On the way there, I took a sleeper train that Class 2 Sleeping Coach (Air) its price was 994B. On the way back, I took a reserved seat that Class 2 Seating Coach (Fan) its price was 344B.  The sleeper train was very comfortable, but the reserved seating was quite harsh (and very hot) and I couldn't sleep on the way.  If I have a next time, I will book sleeping train seat for taking the round trip.